RESEARCH CONCERNING THE WORKABILITY BY SAWING OF FROZEN AND UNFROZEN SPRUCE WOOD
Mihai ISPAS
Prof.Dr.Eng. - Universitatea "Transilvania"
din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov,
Romania
Tel.: +40 268 419581. Fax: +40 268 419581 E-mail:
ispas.m@unitbv.ro
Mihaela CAMPEAN
Prof.Dr.Eng. - Universitatea "Transilvania"
din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov,
Romania
Tel.: +40 268 419581. Fax: +40 268 419581
E-mail: campean@unitbv.ro
Abstract: The paper
presents the results of a research performed in
order to establish if the properties of frozen
spruce wood (in winter) are different from those
of unfrozen timber with regard to its processing.
Spruce timber specimens, cut from the same log,
half of them frozen at -30ºC and half left
unfrozen, were sawn under absolutely identical
conditions (same machine, same tool, same devices
and same cutting conditions), in order to determine
comparatively the energy consumptions involved
in the two cases. The results revealed that freezing
determines a visible decrease of the necessary
power for cutting, respectively the apparent lowering
of the mechanical strengths of wood.
Key words: frozen wood, spruce,
cutting power, energy consumption, mechanical
strengths.
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*** EN 13183-1:2003. Moisture Content of Timber.
Part 1: Determination by Oven-Dry Method.
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